The cache is active by default and it is in folder \\camfs1\General_access\Martin_Marinov\ReForm\Cache .
The cache directory can be changed using the environment variable "ReFormCacheDir" for example 
set ReFormCacheDir \\camfs1\ASM\Users\Marco_Amagliani\reform\
Details:
 - the data defining the optimization problem (problem_data) to be sent to DoCloud are now stored in memory, not in a file.
 - these data are used to create a key_name. The cache system looks for a file key_name.lp . If it exists and the content of key_name.lp is the same as problem_data , the result of the optimization is retrieved in a file key_name.dat.
  - if the cache does not have an entry for prblem_data, the data are sent to DoCloud to be solved and then we store in key_name.lp as and key_name.dat in the cache to be reused the next time.
It is expected more than 50% improvement on test execution (when the cache data are found).

[git-p4: depot-paths = "//ReForm/ReForm/main/CoMISo/": change = 12123]